ECS-2033-080-AU - 8MHz CMOS XO 3.3V Oscillator | ECS Inc.
部品番号: ECS-2033-080-AU ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $1.05 | $1.05 |
| 10 | $0.93 | $9.30 |
| 100 | $0.78 | $78.00 |
| 500 | $0.65 | $325.00 |
| 1,000 | $0.54 | $540.00 |
| 3,000 | $0.42 | $1,260.00 |
ECS-2033-080-AU 概要
An XO (crystal oscillator) is a self-contained timing device that integrates a quartz resonator and an oscillator IC into a single package, delivering a fixed-frequency square wave without requiring external components. Compared with bare quartz crystals, XOs provide tighter frequency tolerance and faster startup, and they sit within the broader timing-device hierarchy as: oscillator -> frequency control -> timing device -> passive/electromechanical component. The ECS-2033 series is the 3.3 V member of ECS Inc.'s subminiature SMD oscillator family, with a 2.5 V counterpart (ECS-2025) covering low-voltage designs.
Key features include ±100 ppm frequency stability over the operating temperature range, an industrial operating range (one distributor listing shows the part spans from −10 °C to +70 °C with extended options available), low current consumption suitable for portable designs, and a tri-state enable/disable pad that allows the oscillator to be placed in a high-impedance state for power management in multi-clock systems. The 4-pad SMD footprint is JEDEC-standard for this subminiature class and supports reflow soldering.
The oscillator uses a fundamental-mode AT-cut quartz resonator coupled to a CMOS inverter/amplifier stage, with on-chip regulation that supplies a clean 3.3 V rail to the resonator circuit. Output drive is a CMOS push-pull stage capable of driving 15 pF loads with sub-nanosecond rise/fall times, while internal damping limits jitter to within HCMOS timing budgets typical for microcontroller clock inputs.
Typical applications include microcontroller and DSP clock inputs, USB-to-UART bridge reference clocks, FPGA general-purpose clock inputs, consumer electronics timing, IoT sensor hubs, and industrial controller boards. The 8 MHz frequency is a common derivative of the 48 MHz USB clock family (8 MHz × 6) and pairs naturally with low-power microcontrollers such as the ATmega328P-AUR and ATSAMD21G18A-MU families.
When designing with this device, observe the enable/disable pad polarity and ensure the output load capacitance does not exceed the 15 pF specification, as additional capacitive loading degrades rise time and may push the duty cycle outside the 45–55% window. A 0.1 µF decoupling capacitor placed within 2 mm of the Vdd pad is recommended.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: ECS-2033-080-AU — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
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ECS-2033-080-BN
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ECS-2033-080-BN-TR
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ECS-2033-080-AU-TR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
ECS-2033-080-BN
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ECS-2033-080-AU
✅ ドロップイン✓ 在庫あり
$0.42 / 個
データシートを見る →ECS-2033-080-AU 仕様
| Frequency | 8 MHz |
| Frequency Stability | ±100 ppm |
| 電源電圧 | 3.3 V |
| 出力タイプ | CMOS (HCMOS) |
| Output Load | 15 pF |
| Duty Cycle | 45% to 55% |
| 機能 | Enable/Disable (Tri-State) |
| パッケージ | 4-SMD, No Lead (2.5 mm × 2.0 mm × 0.8 mm) |
| 実装タイプ | Surface Mount |
| 動作温度 | -10 °C to +70 °C |
| Extended Temperature Option | -40 °C to +85 °C (family option) |
| Packaging | Tape & Reel (TR) |
| RoHS ステータス | Compliant (Pb Free) |
| Series | ECS-2033 (3.3 V HCMOS subminiature SMD) |
| Footprint | 2.0 mm × 2.5 mm subminiature |
ECS-2033-080-AU ピン構成
| ピン 1 | EN — Enable/Disable (active HIGH; LOW = output high-Z) |
| ピン 2 | GND — Ground |
| ピン 3 | OUT — 8 MHz HCMOS output (15 pF drive) |
| ピン 4 | VDD — +3.3 V supply voltage |
主な用途
ECS-2033-080-AU の用途: 6 件s: Microcontroller Clock Reference, USB-to-UART Bridge Reference Clock, FPGA General-Purpose Clock Source, Industrial Controller Board Timing, IoT Sensor Hub Clock, Consumer Electronics Display Timing.
Microcontroller Clock Reference
The ECS-2033-080-AU provides a clean 8 MHz HCMOS clock reference for 3.3 V microcontrollers such as the ATmega328P-AUR, ATSAMD21G18A-MU, and STM32F0/F1/F4 series. Its ±100 ppm stability ensures accurate baud-rate generation for UART peripherals, reliable timer/counter operation, and deterministic ADC sampling windows. The 8 MHz output is a divisor of the 48 MHz USB reference clock family and pairs naturally with peripherals that need 8/16/48 MHz derivatives. The 15 pF CMOS drive capability matches typical MCU XIN pin input capacitance, eliminating the need for external series termination. Enable/disable control supports low-power sleep modes where the host MCU gates the clock to save system power.
おすすめ
USB-to-UART Bridge Reference Clock
USB-to-UART bridges such as the CP2102N-A02-GQFN28 and FT232R families require a precise 12.000 MHz external reference, but designs targeting low-cost HUSB bridges often derive timing from an 8 MHz XO like the ECS-2033-080-AU. The ±100 ppm stability is sufficient for UART baud-rate accuracy within 0.01% over industrial temperature ranges. The enable/disable pad allows the bridge IC to gate the clock during USB suspend, dropping system current draw to under 1 mA. The 2.5 mm × 2.0 mm footprint fits next to QFN-28 bridge packages without forcing a four-layer board. Combined with the CP2102N's internal PLL, 8 MHz input is multiplied to the internal 48 MHz USB clock domain.
おすすめ
FPGA General-Purpose Clock Source
FPGAs in the Lattice ECP5 and Xilinx Spartan-7 families can use the ECS-2033-080-AU as a low-cost general-purpose clock source for non-transceiver logic such as control planes, GPIO synchronizers, and housekeeping logic. The 8 MHz output drives the FPGA's global clock buffer (GBUF) directly, providing a low-jitter reference from which on-chip PLLs generate higher-frequency internal clocks (typically 100-200 MHz). The CMOS 15 pF drive eliminates the need for external clock buffers when trace lengths are kept under 50 mm. Industrial designs benefit from the part's commercial temperature range and ±100 ppm stability, which exceeds the requirement for control-plane timing. The enable pin supports partial reconfiguration workflows where the clock is gated during configuration.
おすすめ
Industrial Controller Board Timing
Industrial PLC and motor-control boards use the ECS-2033-080-AU as a stable 8 MHz reference for deterministic control loop timing. The ±100 ppm accuracy over the commercial temperature range is sufficient for 1 ms control loop periods without drift, supporting applications such as conveyor control, HVAC actuators, and small-motor drives. The 4-pad SMD withstands the mechanical shock and vibration profiles of IEC 60068-2-6 industrial environments when paired with conformal coating. The enable pin allows the controller MCU to disable the oscillator in safety-lockout states, reducing standby power to near zero. Its 2.5 mm × 2.0 mm footprint integrates cleanly onto controller boards that also house TI C2000 or Renesas RX microcontrollers.
おすすめ
IoT Sensor Hub Clock
Low-power IoT sensor hubs use the ECS-2033-080-AU as the system reference clock that wakes the host MCU and coordinates sensor sampling. The 8 MHz frequency provides adequate resolution for typical sensor I2C/SPI buses while keeping dynamic power draw low compared with faster XOs. The tri-state enable pin allows the host MCU to power-gate the oscillator between sensor reads, dropping quiescent current to under 10 µA. Combined with a sub-1 GHz radio like the CC1310F128RHBR or a Wi-Fi module, the 8 MHz XO can serve as the system reference that is multiplied up by the radio's internal PLL. The subminiature 2.5 mm × 2.0 mm footprint fits next to coin-cell battery holders in wearable form factors.
おすすめ
Consumer Electronics Display Timing
Consumer products such as small TFT-LCD modules, e-ink displays, and home appliances use the ECS-2033-080-AU to drive the timing logic that refreshes graphical content at 60 Hz. The 8 MHz reference feeds a microcontroller such as the ATSAMD21G17D-MUT which generates pixel clocks and refresh timing via on-chip timers. The CMOS output drives long PCB traces to the display connector without additional buffering when traces are properly impedance-controlled. The commercial temperature range suits indoor consumer environments, and the RoHS-compliant Pb-free construction satisfies EU and US consumer-electronics directives. The sub-2.5 mm × 2.0 mm footprint integrates into space-constrained wearable and handheld designs.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: ECS-2033-080-AU — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | ECS-2033-080-BN | ECS-2033-080-BN-TR | ECS-2033-080-AU-TR |
|---|---|---|---|---|
| Brand | ECS Inc. | ECS Inc. | ECS Inc. | ECS Inc. |
| Package | 4-SMD, No Lead (2.5 x 2.0 x 0.8 mm) | 4-SMD, No Lead (2.5 x 2.0 x 0.8 mm) - same | 4-SMD, No Lead (2.5 x 2.0 x 0.8 mm) - same | 4-SMD, No Lead (2.5 x 2.0 x 0.8 mm) - same |
| Output Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Frequency Stability | ±100 ppm | ±100 ppm | ±100 ppm | ±100 ppm |
| Operating Temperature | -10 °C to +70 °C | -40 °C to +85 °C (extended) | -40 °C to +85 °C (extended) | -10 °C to +70 °C |
| Output Type | CMOS (HCMOS) | CMOS (HCMOS) | CMOS (HCMOS) | CMOS (HCMOS) |
| Enable/Disable | Yes (Pad 1) | Yes (Pad 1) | Yes (Pad 1) | Yes (Pad 1) |
主な差別化要因
- Subminiature 2.5 mm × 2.0 mm footprint with enable/disable （vs ECS-2033-080-BN)
- Commercial-temperature optimized for indoor consumer designs （vs ECS-2033-080-AU-TR)
- 8 MHz is a USB-friendly derivative frequency （vs ECS-2033-080-BN)
設計ノート
Place a 0.1 µF decoupling capacitor within 2 mm of the VDD pad (Pad 4). The ECS-2033-080-AU's CMOS output stage draws sub-mA current during transitions, and the supply rail must be stiff to prevent frequency pulling or jitter. A 10 µF bulk capacitor is recommended at the regulator output feeding multiple oscillators to suppress crosstalk through shared impedance.
Route the output trace (Pad 3) with a 50 Ω characteristic impedance and keep trace length below 25 mm to avoid ringing. The 15 pF CMOS drive is sufficient for short traces but degrades on long or mismatched lines. A 22-33 Ω series resistor at the driver output damps reflections when the trace exceeds 25 mm or when the load capacitance is not well controlled.
Do not leave the Enable/Disable pad (Pad 1) floating - it must be tied HIGH for normal operation or driven by the host MCU. A floating enable input can result in indeterminate output state, intermittent oscillation, or increased startup time. If no enable control is desired in the final design, connect Pad 1 directly to Pad 4 (VDD) via a short trace.
The ECS-2033-080-AU consumes approximately 7-10 mA from a 3.3 V supply during normal operation, dissipating 23-33 mW of power. The subminiature SMD package dissipates this power without heatsinking across the full -10 °C to +70 °C operating range. Forced-air cooling is not required.
コンプライアンス情報
RoHS compliant (Pb Free) per ECS Inc. ECS-2033 family datasheet and DigiKey product listing. AEC-Q100 not applicable - this is a passive timing component, not an automotive-grade semiconductor. Halogen-free status not explicitly stated in provided data; marked 'unknown'.